CN111649902A - Cyclone supersonic separator experiment system based on aerosol enhanced condensation - Google Patents
Cyclone supersonic separator experiment system based on aerosol enhanced condensation Download PDFInfo
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- 238000009833 condensation Methods 0.000 title claims abstract description 51
- 230000005494 condensation Effects 0.000 title claims abstract description 51
- 239000000443 aerosol Substances 0.000 title claims abstract description 22
- 238000002474 experimental method Methods 0.000 title description 5
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 230000008033 biological extinction Effects 0.000 claims abstract description 13
- 238000009792 diffusion process Methods 0.000 claims abstract description 7
- 238000004458 analytical method Methods 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 24
- 239000007789 gas Substances 0.000 description 17
- 239000003345 natural gas Substances 0.000 description 12
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
- G01N15/0227—Investigating particle size or size distribution by optical means using imaging; using holography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0003—Determining electric mobility, velocity profile, average speed or velocity of a plurality of particles
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Abstract
The invention relates to an experimental system of a cyclone supersonic separation device based on aerosol enhanced condensation, which comprises a combined cyclone supersonic separator, wherein the combined cyclone supersonic separator comprises a cyclone generation section, a supersonic nozzle section, a gas-liquid separation section and a diffusion section, and a cyclone blade is fixed on the cyclone generation section. An aerosol generator is arranged at an inlet of the rotational flow generation section and used for generating heterogeneous condensation nuclei with different particle sizes, mixed gas formed by mixing the heterogeneous condensation nuclei with different particle sizes generated by the aerosol generator and gas positioned at the inlet is generated by the rotational flow generation section, an image method particle size measurement system is arranged at an outlet of the rotational flow generation section and an inlet of the supersonic speed nozzle section, and an extinction method liquid drop size measurement system is arranged behind a throat of the supersonic speed nozzle section, namely a position where condensation starts to occur.
Description
Technical Field
The invention relates to a cyclone supersonic separation device based on aerosol enhanced condensation, belonging to the technical field of condensation separation.
Background
With the development of national economy and industrial manufacturing, people pay more and more attention to the environmental protection problem, so that natural gas as clean and efficient energy plays an increasingly important role. By fully utilizing natural gas, the change of the energy structure of China can be promoted and the state of energy shortage of China can be relieved. The natural gas produced in the gas field is accompanied by water vapor, and dehydration is a very important link before the natural gas is transported.
Conventional dehydration methods for natural gas include adsorption, cooling, absorption, and the like. The adsorption method is a method for adsorbing water vapor in natural gas by using a solid, but the overall technical level of the adsorption method is not mature enough, and the adsorption method is easy to break and poison when the gas pressure drop is large. The cooling method is to reduce the temperature to condense the water vapor into liquid drops and then remove the liquid drops, but the method is suitable for the situation that the temperature of the natural gas is higher. The absorption method removes moisture from natural gas by countercurrent contact of hydrophilic liquid and natural gas, but is sensitive to changes in pressure, flow rate and temperature of the gas.
The supersonic separator is a new natural gas dehydration technology in recent years, and the working principle of the supersonic separator is that natural gas is accelerated from a subsonic state to a supersonic state in a Laval nozzle section, and the temperature is suddenly reduced at the moment, so that water vapor contained in the natural gas is condensed into liquid drops. Compared with the traditional dehydration technology, the supersonic separator has the advantages of low investment cost, high isentropic separation efficiency, no need of adding expensive additives, simple structure and the like.
Disclosure of Invention
The invention aims to provide a cyclone supersonic separator experiment system which is used for researching condensation nuclei with different properties so as to obtain inlet conditions under different conditions and measuring the separation efficiency of a separator under different inlet conditions. The technical scheme is as follows:
a cyclone supersonic separator experiment system based on aerosol enhanced condensation comprises a combined cyclone supersonic separator, wherein the combined cyclone supersonic separator comprises a cyclone generation section, a supersonic nozzle section, a gas-liquid separation section and a diffusion section 7, cyclone blades are fixed on the cyclone generation section, an aerosol generator is arranged at an inlet of the cyclone generation section and used for generating heterogeneous condensation nuclei with different particle sizes, mixed gas formed by mixing the heterogeneous condensation nuclei with different particle sizes generated by the aerosol generator and gas positioned at the inlet is used for generating a cyclone field through the cyclone generation section, and the cyclone separator experiment system is characterized in that an image-method particle size measurement system is arranged at an outlet of the cyclone generation section and the inlet of the supersonic nozzle section and used for measuring the particle size, the gas-liquid separation section and the diffusion section 7 of the cyclone generation section And speed and concentration information, wherein a extinction method liquid drop granularity measuring system is arranged behind the throat part of the supersonic nozzle section, namely at the position where condensation starts to occur, and is used for measuring the position where condensation starts to occur and the particle size distribution parameters of liquid drops formed by condensation.
Preferably, the swirl vanes are detachable, so that the swirl vanes with different structures can be conveniently replaced.
The image-method particle size measurement system comprises a light source controller, a parallel light source, an industrial camera and an industrial computer, wherein a backlight image method is adopted for measurement, and after the depth of field range is calibrated, a plurality of single images are counted to calculate the concentration value of a condensation nucleus; and continuously shooting flow images of the condensation nucleus by an industrial camera, and performing signal analysis by using offline image processing software after obtaining image signals to obtain the speed, the particle size distribution and the concentration parameters of the condensation nucleus at the inlet of the supersonic separator. The extinction method liquid drop granularity measuring system adopts a multi-wavelength extinction method to measure and invert the granularity and the concentration of liquid drops formed by condensation.
Drawings
FIG. 1 is a cyclone supersonic separator experimental system based on aerosol enhanced condensation;
FIG. 2 is a graphical particle size measurement system;
FIG. 3 is a system for extinction droplet size measurement.
The device comprises an aerosol generator 1, a condensation nucleus 2, a cyclone generation section 3, cyclone blades 4, a supersonic nozzle section 5, a gas-liquid separation section 6, a diffusion section 7, a dry gas outlet 8, a combined cyclone supersonic separator 9, a wet gas outlet 10, a liquid drop collecting tank 11, an image method particle size measurement system 12, an extinction method liquid drop size measurement system 13, an industrial computer 14, an industrial camera 15, a parallel light source 16, a light source controller 17, a laser light source 18, a lens 19 and a laser receiver 20
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 1, an experimental system of a cyclone supersonic separator based on aerosol enhanced coagulation consists of an aerosol generator 1, a combined cyclone separator 9, an image-method particle size measurement system 12 and an extinction-method liquid drop size measurement system 13. The combined supersonic cyclone separator 9 consists of a cyclone generation section 3, a supersonic nozzle section 5, a gas-liquid separation section 6 and a diffusion section 7, and the cyclone blades 4 of the cyclone generation section are inserted, so that the structure of the cyclone blades 4 is convenient to replace. The joints of the separator 9 are all flange joints, so that the separator can be optimized conveniently. The aerosol generator 1 can generate three kinds of heterogeneous condensation nuclei 2 with different particle sizes at the inlet of the separator, wherein the first kind is tiny liquid drops of the same substance as inlet steam, the second kind is solid particles soluble in steam and has the function of helping condensation, the third kind is solid particles insoluble in steam and has the function of preventing condensation, and gas and the condensation nuclei pass through a rotational flow generation section so as to generate a rotary flow field. The particle size measuring system 12 measures information such as particle size and concentration of condensation nuclei generated by the aerosol generator 1 at the inlet of the supersonic nozzle section, the supersonic nozzle is contracted and expanded firstly, gas enters the supersonic nozzle section 5 and then is accelerated to a supersonic state along with the processes of cooling and pressure reduction, condensation occurs behind the throat of the supersonic nozzle due to temperature reduction, the liquid drop size measuring system 13 adopting the extinction method is arranged behind the throat of the supersonic nozzle to measure the particle size and concentration of liquid drops generated by condensation, the liquid drop speed can be measured by adopting a cross correlation method, and liquid drops generated spontaneously by condensation are thrown to the wall surface in a swirling flow field, but continue to flow along with airflow due to the action of airflow. In the gas-liquid separation section 6, the dry gas flows through the diffusion section 7, so that the pressure is recovered, the dry gas is discharged from the dry gas outlet 8, part of the gas flow drives the liquid drops to be discharged from the wet gas outlet 10, then the liquid drops flow through the liquid drop collecting tank 11 to be adsorbed, and finally the dry gas and the dry gas at the dry gas outlet are gathered together and discharged.
Referring to fig. 2, the image-method particle size measurement system 12 is composed of a light source controller 17, a parallel light source 16, an industrial camera 15, and an industrial computer 14. The system adopts a backlight image method for measurement, an industrial camera 15 adopts a USB3 interface and is provided with a telecentric lens, and the magnification of the lens is variable; measuring the granularity and the speed by adopting a single-frame exposure method, and counting a large number of pictures to calculate the concentration value of the condensation nucleus after the system calibrates the depth of field range; and continuously shooting the flow images of the condensation nucleus by a camera, and performing signal analysis by using offline image processing software after obtaining image signals, and finally obtaining parameters such as the speed, the particle size distribution, the concentration and the like of the condensation nucleus at the inlet of the supersonic separator.
Referring to fig. 3, the extinction-method droplet size measurement system 13 is composed of a laser receiver 20, a lens 19, and a laser light source 18. The system adopts a multi-wavelength extinction method to measure and invert the granularity and concentration of the liquid drops formed by condensation. The extinction method is a measurement principle in which, since a droplet is scattered, a laser light source 18 emits a laser beam, the laser beam is attenuated when passing through a measurement region, and information such as the size and particle size distribution of a droplet formed by coagulation is estimated by inverse calculation by measuring the intensity of original light and the intensity of transmitted light of the laser light source.
In conclusion, the experimental system of the cyclone supersonic separator based on the aerosol enhanced condensation has the advantages of high entropy efficiency, simple structure and the like, and also has the advantage of adjustable structure, so that various structures can be formed for convenient research. The condensation nuclei with different properties are generated by the aerosol generator 1, so that the inlet conditions of different conditions are obtained, the separation efficiency of the separator under different inlet conditions can be measured, the actual conditions can be simulated more truly, the separator is optimized, and the separator can be better applied. Information such as the granularity and the concentration of the condensation nuclei is obtained by the image-method particle granularity measuring system 12, so that the conditions of the condensation nuclei at the inlet of the cyclone supersonic separation device are obtained; because the condensation of the supersonic separation device occurs behind the throat of the supersonic nozzle section, the extinction method liquid drop particle size measurement system 13 is arranged behind the throat of the supersonic nozzle section, and information such as particle size distribution of liquid drops formed by condensation is pushed out through the laser transmission optical window and inversion, so that the influence of condensation check generated by aerosol on the condensation effect is obtained, and the separation efficiency of the separator is improved.
Claims (4)
1. An experimental system of a cyclone supersonic separation device based on aerosol enhanced condensation comprises a combined cyclone supersonic separator, wherein the combined cyclone supersonic separator comprises a cyclone generation section, a supersonic nozzle section, a gas-liquid separation section and a diffusion section, and a cyclone blade is fixed on the cyclone generation section. The device is characterized in that an aerosol generator is arranged at an inlet of a rotational flow generation section, the aerosol generator is used for generating heterogeneous condensation nuclei with different particle sizes, mixed gas formed by mixing the heterogeneous condensation nuclei with different particle sizes generated by the aerosol generator and gas positioned at the inlet is generated through the rotational flow generation section, an image method particle size measurement system is arranged at an outlet of the rotational flow generation section and an inlet of a supersonic nozzle section and is used for measuring particle size, speed and concentration information of particles after rotational flow, an extinction method liquid drop size measurement system is arranged behind a throat of the supersonic nozzle section, namely at a position where condensation starts to occur, and is used for measuring a position where condensation starts to occur and particle size distribution parameters of liquid drops formed by condensation.
2. The experimental system of claim 1, wherein the swirl vanes are detachable, so that the swirl vanes with different structures can be replaced conveniently.
3. The experimental system of claim 1, wherein the image-based particle size measurement system comprises a light source controller, a parallel light source, an industrial camera and an industrial computer, and the measurement is performed by using a backlight image method, and after a depth field range is calibrated, a concentration value of a condensation nucleus is calculated by counting a plurality of single images collected; and continuously shooting flow images of the condensation nucleus by an industrial camera, and performing signal analysis by using offline image processing software after obtaining image signals to obtain the speed, the particle size distribution and the concentration parameters of the condensation nucleus at the inlet of the supersonic separator.
4. The experimental system of claim 1, wherein the extinction method droplet size measurement system employs a multi-wavelength extinction method to measure and invert the size and concentration of droplets formed by condensation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390765A (en) * | 2021-06-30 | 2021-09-14 | 中国人民解放军战略支援部队航天工程大学 | Research method for influence of shock wave on evaporation process of fuel liquid drops under supersonic airflow |
| CN113607388A (en) * | 2021-06-25 | 2021-11-05 | 天津大学 | Supersonic separator monitoring and fault diagnosis system based on flexible liquid film sensor |
| CN113654757A (en) * | 2021-08-27 | 2021-11-16 | 中国科学技术大学 | Device for simulating high supersonic velocity condensation process in spray pipe and diagnosis method |
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2020
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607388A (en) * | 2021-06-25 | 2021-11-05 | 天津大学 | Supersonic separator monitoring and fault diagnosis system based on flexible liquid film sensor |
| CN113607388B (en) * | 2021-06-25 | 2024-01-19 | 天津大学 | Ultrasonic separator monitoring and fault diagnosis system based on flexible liquid film sensor |
| CN113390765A (en) * | 2021-06-30 | 2021-09-14 | 中国人民解放军战略支援部队航天工程大学 | Research method for influence of shock wave on evaporation process of fuel liquid drops under supersonic airflow |
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| CN113654757A (en) * | 2021-08-27 | 2021-11-16 | 中国科学技术大学 | Device for simulating high supersonic velocity condensation process in spray pipe and diagnosis method |
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